Some US will be voting on their mobile phones and computers but how secure are the systems?
The owner says the blogger made him a social media celebrity to earn money.
As China's Ant Group prepares for its stock market debut, we look at how it established its empire.
App initially did not terminate account of man offering to send naked image to 14-year-old's account.
Behind the promises and the hype, Crowd1 hides some ugly truths, some wealthy scammers, and a whole pyramid of lies.
Scientists devise ways to improve brain scans by asking the public to sign up for a dating-style app.
The BBC's specialist disinformation reporter explains how to help people who've fallen down the rabbit hole.
Two chatbots meet and put the world to rights online in battle to see who is most human-like.
Director Remi Weekes says film explores "the horrors that we do as humans to other humans".